
Winchmore Hill · Family residential
Luxury construction & refurbishment in Winchmore Hill.
Family house refurbishment and extension in Winchmore Hill, Grange Park and Southgate across N21 and N14.
N21
Delivering in Winchmore Hill
Winchmore Hill and neighbouring Grange Park hold some of North London's most substantial family houses. The Green conservation area sits at the heart of the village, and the surrounding streets run to large detached houses that benefit from proper refurbishment and considered extension. Our Enfield-based team works in N21 constantly.
Ushii is a London construction house working with private clients, family offices and developers across Winchmore Hill and the surrounding prime postcodes. Every project is delivered by our own directly employed teams under a single point of accountability from first survey to final handover.
Properties we work on
What we build in Winchmore Hill.
Where our teams focus
Winchmore Hill disciplines.
Whole-house refurbishment
Strip-back refurbishment of Winchmore Hill and Grange Park family houses, delivered by our directly employed local team.
Side and rear extensions
Substantial family extensions designed under LB Enfield planning, with quality drawings and clean delivery.
Loft conversion
Dormer and mansard loft conversions creating additional bedrooms and en-suites for growing families.
Kitchen and joinery
Bespoke joinery from our own workshop, installed by the makers, in occupied family houses.

Services available in Winchmore Hill
Every discipline, under one team.
Answers
What Winchmore Hill clients ask.

Do you know the Winchmore Hill Green conservation area?
Yes. It's on our doorstep. We prepare submissions and respond to LB Enfield conservation officer queries as part of the standard process.
Can you work in an occupied Grange Park house?
Yes. We phase works around family life and protect finished rooms daily. Some phases need shutdown windows; most don't.
How long does a full refurbishment take?
For a substantial N21 family house, plan on six to twelve months on site, depending on extension and basement scope.
Do I need planning permission for an extension in Winchmore Hill?
Outside the conservation area many schemes are achievable under permitted development, which shortens the route to site considerably. We confirm the position for your specific address before any design work begins, including whether the property sits inside a conservation area or carries an Article 4 direction.
Which council covers Winchmore Hill?
Winchmore Hill is covered by the London Borough of Enfield. The Winchmore Hill Green Conservation Area protects the older houses around the Green and the lanes leading off it.
How long does a project in Winchmore Hill usually take?
Three to six months for an extension and loft, five to nine for a whole house.
What kind of properties do you work on in Winchmore Hill?
Edwardian and 1930s family houses, larger detached houses around the Green, and Victorian cottages on the older lanes. Our Winchmore Hill work is mainly rear and wraparound extensions, loft conversions, roof renewal and whole-house modernisation.
Do you use subcontractors on Winchmore Hill projects?
No. Every trade on site is directly employed by Ushii, so the people who price your Winchmore Hill project are the people who build it.
Services in Winchmore Hill
Explore a specific trade in Winchmore Hill.
Local guide
Building in Winchmore Hill: renovation, planning and getting it right
Housing stock, council planning policy, realistic programmes and the site logistics behind a Winchmore Hill project.
Read the guide →
Also delivering in